Home / 3,122.28-4,310.47-2,129.01

Finding the Fourth Proportional to 3,122.28, 4,310.47 and 2,129.01

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Solution

The fourth proportional to 3,122.28, 4,310.47 and 2,129.01 is: 2,939.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.28 : 4,310.47 = 2,129.01 : x
  2. Step 2: Convert to fraction form
    3,122.28/4,310.47 = 2,129.01/x
  3. Step 3: Cross multiply
    3,122.28x = 4,310.47 × 2,129.01
  4. Step 4: Simplify right side
    3,122.28x = 9,177,033.73
  5. Step 5: Solve for x
    x = 9,177,033.73/3,122.28
  6. Step 6: Final answer
    x = 2,939.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.